upgraded ct-26

[Boost Lee]

Mr. Upgraded CT King here.

I've experimented A LOT with Upgraded CT-26's over the last year.

Have I done thing ass-backwards? In most people's cases, yes...but not abused.

As Aye-mate said, backing the screw out on your stock AFM, that will typically raise your FCO point...sometimes by half a PSI, sometimes 4-5psi.
By accident, I've hit 18psi (FCO at 18.5psi) on completely stock fuel system and stock AFM.

Before I go any further, I've currently got a 60-1 CT on there right now.
It is *definately* recommended to upgrade your fuel before adding big HP adders...but with my case, I wanted to go balls out on the stock fuel system before doing a COMPLETE rebuild. For a majority of the time, I ran everything at 13-15psi daily. Completely untuned with a minor boost leak, by dynojet, did 320rwhp/360rwtq at 13psi. Again, recommended? Most certainly not, but I was willing to accept the consequences as everything was just for experimental purposes. (BTW, everything on that part has been great.)

Cliff notes - Yes, you CAN run an upgraded CT-26 with more than factory boost...just make sure that if you are a hardcore racer or anything, have some sort of monitoring system (wideband, S-AFC, etc), definately recommended. And none of that hearsay BS, I've played around a lot with it...

Jeff

 

[bountykilla0118]

How are you getting 14 psi without hitting fuel cut? do you have a Lexus AFM?

The afm screw is adjusted and i also i have a few holes in my accordian hose:evil2:

 

[bountykilla0118]

Mr. Upgraded CT King here.

I've experimented A LOT with Upgraded CT-26's over the last year.

Have I done thing ass-backwards? In most people's cases, yes...but not abused.

As Aye-mate said, backing the screw out on your stock AFM, that will typically raise your FCO point...sometimes by half a PSI, sometimes 4-5psi.
By accident, I've hit 18psi (FCO at 18.5psi) on completely stock fuel system and stock AFM.

Before I go any further, I've currently got a 60-1 CT on there right now.
It is *definately* recommended to upgrade your fuel before adding big HP adders...but with my case, I wanted to go balls out on the stock fuel system before doing a COMPLETE rebuild. For a majority of the time, I ran everything at 13-15psi daily. Completely untuned with a minor boost leak, by dynojet, did 320rwhp/360rwtq at 13psi. Again, recommended? Most certainly not, but I was willing to accept the consequences as everything was just for experimental purposes. (BTW, everything on that part has been great.)

Cliff notes - Yes, you CAN run an upgraded CT-26 with more than factory boost...just make sure that if you are a hardcore racer or anything, have some sort of monitoring system (wideband, S-AFC, etc), definately recommended. And none of that hearsay BS, I've played around a lot with it...

Jeff

So you are running a ct26 60-1 and stock fuel system? Personally i dont think the 440's are hitting that danger area in terms of their duty cycle from what i remember a good "rule of thumb" (not a percise way of measure but gives u a good starting point) is that the 440's are good up until the low 400hp range

 

[cypher02xd]

440s i would say are good to about 375ish whp. i wouldn't want to push it much farther than that. IF you push the injectors past 80% duty then i'm sure you can see 400ish but honestly i'm the kind of guy who'd rather be safe instead of damaging things.

For those who don't know, if you push injectors beyond their 80% duty cycle you run the risk of damaging the injectors. Above 80% the injectors are generating more heat which can cause damage to the components and you can forget about what happens at 100%. If you push it that far you don't even have any control anymore. The injector is just stuck open and spraying and this is where you see things going badly for your car!

 

[Insidious Surmiser]

can't remember who, but someone was dynoing 429 whp on 440's

w/pvc intercooler pipes

 

[bountykilla0118]

i know who u are talkin about he also has a website

 

[doom26464]

ok I was looking at the mdc turbos. Whats the deal with BB?? What are the advantages of having BB??

 

[Boost Lee]

Well we are currently still waiting for official results before we start selling them again. As long as everything goes smoothly, the availability (although kind of rough), will still be available to you guys.

With a ballbearing center cartridge, you are going to get quicker spool...As I said, it shouldn't be too much longer before we finalize selling them or not. We just need to make sure that they are doing their job! :icon_surp

Jeff

 

[foreverpsycotic]

a little reduction in spool, and IMO on a upgraded ct its not worth it, its not really a lag monster

 

[doom26464]

a little reduction in spool, and IMO on a upgraded ct its not worth it, its not really a lag monster

ok thats cool then probaly just a 57 trim from mdc would proably be fine im guessing. I could run that on the stock fuel system with stock boost and be fine till I upgrade my fuel system right?

 

[Boost Lee]

Yes. Again, is it "recommended" to upgrade your fuel? Yes. But you aren't necessarily going to HURT anything so much as you just won't be taking complete advantage of your power output. However, it CAN be abused if you try to run too much boost for too long...especially without anything to tune and/or monitor with.

Jeff

*edit* As for getting a turbo, Shoot me a PM if you want further details...

 

[bountykilla0118]

define too much boost and time? would you consider 14psi to be to much boost and as a daily driver?

 

[Boost Lee]

Eh...it really depends on your vehicle. Assuming you've got a 'healthy' stock fuel system and at least a wideband for monitoring, 14psi isn't a problem.
I did it for about a year on a .57 trim with no problems except the occaisional IC pipe popping off...of course, hardpipes took care of that. Also, 14psi is typically close to if not at your FCO point, so by means of a MBC or EBC, play with it until you feel comfortable with it.

Again, keeping stock fuel system and running that amount of boost...and assuming you are completely untuned, you are really hiding a lot of power.

Jeff

 

[TurboWarrior]

without the supporting mods don't do the turbo. at a lower mod level you get much more torque from the motor from the stocker anyway. why bring down your drivability? youd get more horsepower but its delayed.

 

[Boost Lee]

I got over 40 more rwtq than rwhp with my 60-1 and a mainly stock motor. I didn't bring down my drivability. It was very much streetable with VERY minimal lag and my daily driver.

Jeff

 

[GotToyota?]

I saved up parts on the shelves in my basement until I had everything I needed, that helped not having to buy parts in any particular order, so when I had money to spend, I could buy whatever I could get the best deal on.

Sounds like what I'm gonna have to do so that my car won't be down for any certain period of time longer then a month. I still don't know what I'm gonna do to go turbo, I've thought of many options, NA-T, GTE swap, there's so many options. I'm just thinking the simplest/cheapest will be NA-T with all stock components except for intercooler, DP, exhaust, etc. I'd probably keep it @ 8 psi until I could get a sufficient tune and upgraded clutch.

BTW, sorry to jack the thread.

-Matt

 

[MRSUPRA]

Just fyi, i ran my CT-26 upgrade at 11 psi with no fuel cut and no problems with stock fuel and AFM for about a year. I did start hitting fuel-cut at around 12psi. Talk about a night and day difference when I added 550's LexAfm, and 18psi. To be honest, the sup kind of felt like a dog at 11psi with the upgraded CT. I ran a best 13.7 at 102mph at 11-12psi on the 440 injectors untuned.